Jet pump won't make pressure

After spending over $400 I'm going to try this on my own....with your help.
Background.....My foot valve let go and the guy that replaced it started messing with the pump also.It's a Jacuzzi 1/2 HP I think.Before the foot valve let go I ran it at 50lbs shut off 35lbs turn on.When he got done messing with it(and another of his fellow workmates on another call) I was down to 32lbs shut off.That gradually got worse to the point that last night I had to adjust the pressure switch again cause it wouldn't shut off,down to 20lbs.
I need to know where is the best place to start tackling this from.As of this moment I have the tank drained(it had very little water in it,no bladder) The venturi tube out(looks fine) and the fitting unhooked from the pump to the tank.The fitting that goes from the pump to the tank was loose with a slight leakage.Could this be the cause? Thanks in advance for your help.
Pat

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Jet pump won't make pressure

Quote:

Originally Posted by buick60

After spending over $400 I'm going to try this on my own....with your help.
Background.....My foot valve let go and the guy that replaced it started messing with the pump also.It's a Jacuzzi 1/2 HP I think.Before the foot valve let go I ran it at 50lbs shut off 35lbs turn on.When he got done messing with it(and another of his fellow workmates on another call) I was down to 32lbs shut off.That gradually got worse to the point that last night I had to adjust the pressure switch again cause it wouldn't shut off,down to 20lbs.
I need to know where is the best place to start tackling this from.As of this moment I have the tank drained(it had very little water in it,no bladder) The venturi tube out(looks fine) and the fitting unhooked from the pump to the tank.The fitting that goes from the pump to the tank was loose with a slight leakage.Could this be the cause? Thanks in advance for your help.
Pat

All it takes is a little flake of rust to cause this. Or, a pinhole in the drop pipe.

Pull it out and see what is going on.

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Jet pump won't make pressure

As soon as he replaced the foot valve he cleaned the pump....no rust.I have a lot of Iron in my water,but that isn't the issue I don't think.A pin hole....it would have to be from the well to the pump.No sign from the well unless it was done inside the well when he did the foot valve.....

Jet pump won't make pressure

Quote:

Originally Posted by buick60

As soon as he replaced the foot valve he cleaned the pump....no rust.I have a lot of Iron in my water,but that isn't the issue I don't think.A pin hole....it would have to be from the well to the pump.No sign from the well unless it was done inside the well when he did the foot valve.....

Jet pump won't make pressure

Great,now I have to pump out the well and I may as well change the down pipe that the foot valve is on.Maybe I'll luck out and it will be at the top elbow (which is still under water) and I can tighten everything up there.

Jet pump won't make pressure

Quote:

Originally Posted by buick60

Great,now I have to pump out the well and I may as well change the down pipe that the foot valve is on.Maybe I'll luck out and it will be at the top elbow (which is still under water) and I can tighten everything up there.